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Luminescence properties of CsPbBr3:Mn nanocrystals

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Abstract

Mn-doped CsPbBr3 nanocrystals with sizes of ~10 nm are synthesized by hot injection method via the addition of HBr in the precursor. The sizes and crystal structure are not influenced by the addition of HBr. The photoluminescence (PL) mechanism of CsPbBr3 is modified by HBr, leading to the PL peak shift to 433 nm, which is not the regular PL of CsPbBr3. The irregular CsPbBr3 nanocrystals prepared with HBr enable the Mn doping, leading to the red emission of Mn. The PL energy transfer from CsPbBr3 to Mn is studied as a function of HBr. The energy transfer of ~90% is achieved in this system. In addition, the crystallinity of the CsPbBr3 nanocrystals is also improved by the HBr, leading to better photodetector device performance.

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Acknowledgments

This work is supported by NSF-PREM grant #DMR-1826886. The TRPL equipment used in this work is supported by National Science Foundation Research Initiation Award: Novel Perovskite Solar Cells Based on Interface Manipulation (Award# 1900047). Dr. Jian Xiong is supported by the National Science Foundation under Grant No. 1757220. This work is also partially supported by NIH grant (1U54MD015929) by using Horiba fluoromax-4 Compact Spectrofluorometer to measure the PL of the samples. The XRD used in this work is supported by the U.S. Army Engineer Research and Development Center (W912HZ-16-2-0021).

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Correspondence to Qilin Dai.

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He, W., Zhang, Q., Qi, Y. et al. Luminescence properties of CsPbBr3:Mn nanocrystals. J Nanopart Res 23, 80 (2021). https://doi.org/10.1007/s11051-021-05184-7

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  • DOI: https://doi.org/10.1007/s11051-021-05184-7

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